| 摘要 |
The necessity to get higher degrees of safety through better stabilities of the "Scooter-Cyclemotor-Bicycle-Motorcycle" has made these 2 kinds of assemblies (front and rear). The Front assembly always has forwarding the "2 steering, inclining, shock-absorbing, braking, parallel front wheels" and with the already existent 1 rear-wheel in the rear side, or with the Rear-assembly, that has the "2 inclining, shock-absorbing, braking, parallel rear-wheels" (Page: 1,2,3,4,5,6,7./7). Those 2 kind of assemblies are singularly, or both, suitable to build a vehicle with '3, or 4 wheels ' (with 2 rear-wheels), always determining 3 or 4 points of contact on the ground (not only 2). The vehicle with '3, or 4 wheels' is safer, it's more vertical steady and answers the highest degrees safeties either, with a second passenger on board, or with major loads upon (like heavier accumulators use for electric or hybrid power and/or if it uses major load-structures like new body carriage). The vehicle is always safe especially when adverse metheo-conditions happen (stormy weather, snowing, hailing etc.), or in specific unbalanced conditions (like in up or down dangerous pending roads "in uphill or downhill"). Then the Front-assembly with, or w/o the Rear-assembly offers the following advantages in: .A) STAND UP STABILITY in 'parking mode'.B)STAND UP STABILITY in 'marching and in turning mode' (without or with braking) .C) AGILITY inside SECURITY either in the urban traffic or in highways. .D) GOOD ROADABILITY.
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